<template>
	 <div>
      <div class="search">
           <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
      </div>
      <div class="search-content" ref="search" v-show="keyword">
          <ul>
              <li class="search-item border-bottom" v-for="item of list" :key="item.id" @click="handleCityClick(item.name)">
                 {{item.name}}
              </li>
              <li class="search-item border-bottom" v-show="hasNoData">
                   没有找到匹配数据
              </li>
          </ul>
      </div> 
   </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default { 
	name: 'CitySearch',
  props: {
     cities: Object
  },
  data () {
     return {
        keyword: '',
        list: [],
        timer: null
     }
  },
  computed: {
      hasNoData () {
         return !this.list.length
      }
  },
  watch: {
      keyword () {
         if (this.timer) {
            clearTimeout(this.timer)
         }
         if (this.keyword) {
            this.list = []
            return
         }
         this.timer = setTimeout(() => {
            const result = []
            for(let i in this.cities){
                this.cities[i].forEach((value) => {
                   if(value.spell.indexOf(this.keyword) > -1 || 
                    value.name.indexOf(this.keyword) > -1) {
                      result.push(value)
                   }
                })
              }
              this.list = result
         },100)
      }
   },
   methods: {
          handleCityClick(city){
            this.changeCity(city)
            this.$router.push('/')
          },
        ...mapMutations(['changeCity'])
   },
   mounted () {
       this.scroll =new Bscroll(this.$refs.search)
   }
}
</script>

<style lang="stylus" scoped>
   @import '~styles/varibles.styl'
   .search
       height: .72rem
       padding: 0 .1rem
       background: $bgColor
       .search-input
           box-sizing: border-box
           width: 100%
           height: .62rem
           padding: 0 .1rem
           line-height: .62rem
           text-align: center
           border-radius: .06rem
           color: #666
   .search-content
      z-index: 1
      overflow: hidden
      position: absolute
      top: 1.58rem
      left: 0
      right: 0
      bottom: 0
      background: #eee
      .search-item
         line-height: .62rem
         padding-left: .2rem
         color: #666

</style>